| Strive Simulations Ltd | Information & communication | 2014 |
| Strivify Ltd | Professional & scientific | 2025 |
| Strole Trans Ltd | Transport & logistics | 2014 |
| Strong Group Security Limited | Administrative & support | 2023 |
| Strongbridge Capital Holdings Ltd | Wholesale & retail | 2025 |
| Stronger With Sharon Ltd | Arts & recreation | 2024 |
| Strongman FM Services Ltd | Administrative & support | 2015 |
| Strucraft Ltd | Construction | 2025 |
| Structrax UK Ltd | Construction | 2025 |
| Stth Properties Ltd | Real estate | 2025 |
| Studio 2 Limited | Professional & scientific | 2010 |
| Studio 6 + 2 Limited | Professional & scientific | 2023 |
| Studletl Ltd | Real estate | 2025 |
| Study Path Consultant's Ltd | Professional & scientific | 2026 |
| Stuffbox Ltd | Wholesale & retail | 2024 |
| Style & Fit UK Limited | Wholesale & retail | 2013 |
| Style Cartel Media Ltd | Professional & scientific | 2019 |
| Style My Bedroom.Com Limited | Wholesale & retail | 2011 |
| Stylin Chic Ltd Ltd | Other services | 2022 |
| SU CHE Limited | Real estate | 2024 |
| Sub-Tech Contracts Limited | Construction | 2008 |
| Sub-Tech Plant Hire Limited | Administrative & support | 2015 |
| Subhra Healthcare Limited | Health & social care | 2015 |
| Subliminal Digital Limited | Information & communication | 2024 |
| Success Muse Business Advisory Limited | Professional & scientific | 2018 |
| Sugar Tango & Company Ltd | Construction | 2026 |
| Sujaan Property Ltd | Real estate | 2023 |
| Sujan Taxi Ltd | Transport & logistics | 2026 |
| Sukhdev SINGH2 Ltd | Construction | 2015 |
| Sukhjit Singh Ltd | Construction | 2026 |
| Summer Living Limited | Real estate | 2024 |
| Summy Creations Ltd | Hospitality | 2023 |
| Sun and Sky Travels Ltd | Administrative & support | 2018 |
| Sun Sweet Ltd | Construction | 2012 |
| Sunbrian Contractors Ltd | Construction | 2021 |
| Sunbrian Services Ltd | Construction | 2024 |
| Suncity Investments Company Limited | Real estate | 2000 |
| Sung Services Ltd | Hospitality | 2019 |
| Sunig Clemadeos (UK) Ltd | Extraterritorial | 2007 |
| Sunmi's Global Limited | Manufacturing | 2022 |
| Sunnah Property Ltd | Real estate | 2023 |
| Sunnyvale Ltd | Real estate | 2020 |
| Sunrise Bradford Ltd | Real estate | 2023 |
| Sunrise Exotic Limited | Wholesale & retail | 2017 |
| Sunset City Ltd | Real estate | 2025 |
| Sunset Eco Energy Ltd | Construction | 2023 |
| Sunshine Childcare London Limited | Education | 2014 |
| Sunshine Facility Management Ltd | Administrative & support | 2024 |
| Sunstone Healthcare Limited | Administrative & support | 2024 |
| Supa London Limited | Wholesale & retail | 2017 |
| Super One Services Limited | Transport & logistics | 2020 |
| Super Star 07 Ltd | Wholesale & retail | 2025 |
| Super Transfer UK Ltd | Financial services | 2017 |
| Super Whale Ltd | Information & communication | 2026 |
| Superb Business Accelerator Ltd | Information & communication | 2023 |
| Superior Management Solution Limited | Wholesale & retail | 2026 |
| Support to Settle CIC | Information & communication | 2026 |
| Supporting Care Barking and Dagenham Ltd | Health & social care | 2018 |
| Supreme Apparels Limited | Wholesale & retail | 2024 |
| Supreme Carpentry Ltd | Construction | 2023 |
| SUR Habitat Ltd | Real estate | 2024 |
| Sure Comfort Limited | Water & waste | 2010 |
| Suregeorge Ltd | Construction | 2014 |
| Sureshine Cleaning Management Limited | Administrative & support | 2026 |
| Suresteps Wellbeing Services CIC | Health & social care | 2022 |
| Surety Care and Services UK Ltd | Administrative & support | 2018 |
| Surge Host Ltd | Information & communication | 2020 |
| Surtaj Property Investment Ltd | Real estate | 2025 |
| Suruz of Ambari Ltd | Hospitality | 2026 |
| Sushi Fusion Ltd | Hospitality | 2025 |
| Sushi Property Management Ltd | Real estate | 2025 |
| Sussex Mango's Ltd | Hospitality | 2023 |
| Sustainability Projects for Youths Initiative UK C.I.C. | Education | 2024 |
| Suvai Foods (UK) Limited | Administrative & support | 2017 |
| SV Building Ltd | Construction | 2026 |
| SV GAS and Heating Ltd | Construction | 2024 |
| SW Gym Hire Ltd | Arts & recreation | 2019 |
| SW Performance Ltd | Other services | 2019 |
| SWADHARMA369 Ltd | Administrative & support | 2025 |
| Swansgate Ltd | Real estate | 2022 |
| Sweet London Gjana Ltd | Hospitality | 2016 |
| Sweet Spot 19 Ltd | Hospitality | 2026 |
| Sweet Spot Dessert Parlour Ltd | Hospitality | 2025 |
| Sweetmother Childcare Ltd | Health & social care | 2023 |
| Swift Edge Ltd | Wholesale & retail | 2017 |
| Swift Security & Property Services Limited | Real estate | 2025 |
| Swift Services Provider Ltd | Wholesale & retail | 2014 |
| Swift SF Limited | Health & social care | 2017 |
| Swift Supplies & Services Limited | Construction | 2013 |
| Swiftacc Limited | Professional & scientific | 2023 |
| Swiftmart Online Ltd | Wholesale & retail | 2025 |
| Swiftmotorsuk Ltd | Wholesale & retail | 2025 |
| Swiftride Chauffeurs Ltd | Transport & logistics | 2025 |
| Swiftsave Healthcare Ltd | Health & social care | 2024 |
| Swiftsave Home Ltd | Hospitality | 2023 |
| Swiftshuttle Ltd | Transport & logistics | 2023 |
| Swipe Ride Ltd | Transport & logistics | 2026 |
| Swiss Trade Ltd | Manufacturing | 2009 |
| SWM Collective Ltd | Wholesale & retail | 2026 |
| Sword Facilities Services Ltd | Administrative & support | 2020 |